I’m in a rush today, very busy but first download the Linux version of Ventoy:
Extract the downloaded tarball to a folder on your system.
Open a terminal in the extracted directory and run the installation script with root privileges using the command sudo ./Ventoy2Disk.sh -i /dev/sdX, replacing /dev/sdX with the actual device name of your USB drive (e.g., /dev/sdb).
After that just copy a current version for rEFInd,
Scroll down until you see this “A USB flash drive image file”
After the DL extract that zip file and copy the image, it should read as refind-flashdrive-0.14.2.img
Now just copy that to the Ventoy USB drive and when your ready Reboot to that USB Ventoy drive and select refind.
Now to refresh all new drives press [Esc] that will look for any newly connected bootable drives.
All this seem like a huge hassle but it has saved my bacon more than once. 
I’ll check back to see how your doing, and Good Luck.
btw if your drive is big enough you can keep a install .iso as well.
ls /run/media/me/Ventoy/
1.refind-flashdrive-0.14.0.2.img cachyos-desktop-linux-250828.iso